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Debug a Policy

To understand what each rule is doing (whether written with a snippet or a custom rule), see the following options:

  • Use the Preview button to provide a sample input and see if the output is what you expect. Notice that each rule optionally returns a message and helps you to identify which rules contribute to a final decision.
  • Use the Preview button to provide a sample input and also select the Coverage option. Now, you will see which lines of Rego contributed to the overall decision you see in the output.
  • View the underlying Rego by switching the policy editor to Code view, finding the card or code you are interested in, and clicking the blue highlighted line number.
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The Rego code will be shown inline and includes an expansion arrow in the upper right corner that opens that Rego file full-screen in another browser tab.

  • Modify the Rego by adding print statements, running the Preview option, and viewing the print output in the Print pane.
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For more information on policy editing, see Write Policies.